参数资料
型号: S-1313D35-N4T1U3
元件分类: 固定正电压单路输出LDO稳压器
英文描述: FIXED POSITIVE LDO REGULATOR, PDSO4
封装: HALOGEN FREE AND LEAD FREE, SC-82AB, 4 PIN
文件页数: 11/50页
文件大小: 641K
代理商: S-1313D35-N4T1U3
SUPER LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1313 Series
Seiko Instruments Inc.
19
Operation
1. Basic operation
Figure 17 shows the block diagram of S-1313 Series.
The error amplifier compares the reference voltage (Vref) with feedback voltage (Vfb), which is the output voltage
resistance-divided by feedback resistors (Rs and Rf). It supplies the gate voltage necessary to maintain the constant
output voltage which is not influenced by the input voltage and temperature change, to the output transistor.
*1
*1. Parasitic diode
VSS
Current
supply
+
Vfb
Vref
VIN
VOUT
Rf
Rs
Error
amplifier
Reference voltage
circuit
Figure 17
2. Output transistor
In the S-1313 Series, a low on-resistance P-channel MOS FET is used as the output transistor.
Be sure that VOUT does not exceed VIN
+ 0.3 V to prevent the voltage regulator from being damaged due to inverse
current flowing from the VOUT pin through a parasitic diode to the VIN pin.
相关PDF资料
PDF描述
S-1167B32-I6T2U 3.2 V FIXED POSITIVE LDO REGULATOR, 0.23 V DROPOUT, PDSO6
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S-1167B47-I6T2U 4.7 V FIXED POSITIVE LDO REGULATOR, 0.21 V DROPOUT, PDSO6
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